竞争性吸附实验揭示了新的回归模型,用于预测PhAC在碳酸性材料上的吸附
Edinsson Muñoz-Vega1, Marcel Horovitz2, Lisa Dönges1
1Technical University of Darmstadt, Institute of Applied Geosciences, Schnittspahnstraße 9, Darmstadt D-64287, Germany.
Journal of hazardous materials
|April 19, 2024
概括
了解药用活性化合物 (PhACs) 吸附到碳材料上的理解是水资源整治的关键. 这项研究将pH值依赖的水溶性纳入模型中,改善了对碳胺,易布洛芬和硫甲等污染物的预测.
科学领域:
- 环境化学环境化学
- 水处理技术水处理技术
- 吸附科学 吸附科学
背景情况:
- 热改变的碳质材料 (TACM) 对于从水中去除疏水性有机污染物至关重要.
- 吸附等温体,特别是波兰尼-杜宾尼-曼尼斯 (PDM) 模型,用于描述这个过程.
- PDM模型通常使用水溶性 (Sw),但其对可电离药物活性化合物 (PhACs) 的pH依赖性经常被忽视.
研究的目的:
- 开发一个理论框架,将pH依赖的水溶性整合到PhAC吸附的PDM模型中.
- 研究环境pH对常见PhACs在不同碳吸附剂上的竞争性吸附的影响.
- 提高环境矩阵中PhAC吸附模型的预测能力.
主要方法:
- 修改了Polanyi-Dubinin-Manes (PDM) 方程,以考虑pH依赖的水溶性 (Sw).
- 研究了卡巴马泽,易布洛芬和硫甲在生物炭,粉末活性炭和状活性炭上的竞争性吸附.
- 在不同pH条件下使用单溶液和竞争性合实验分析了合数据.
- 使用Sw作为线性回归模型中的参数,以关联合系数.
主要成果:
- 环境pH显著影响PhACs的疏水性和吸附行为.
- 修改后的PDM模型有效地描述了单溶液和竞争性吸附的观察到的变化.
- 随着pH值的变化是解释化差异的关键因素 PhACs 像卡巴马西平,易布洛芬和硫.
结论:
- 考虑pH值依赖的水溶性对于准确地对TACM建模PhAC吸附至关重要.
- 提出的理论框架有助于更好地理解和预测水处理中的PhAC去除.
- 结合pH调整的Sw可以增强预测PhAC吸附到碳质材料的现有方法.
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